defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Matrices Adjoint and Inverse of a Square Matrix
Let \(\rm B = \begin{bmatrix} 1 & 3 \\[0.3em] 1 & 5 \\[0.3em] \end{bmatrix}\,\) and A be a 2 × 2 matrix such that AB–1 = A–1. If BCB–1 = A and C4 + αC2 + βI = O, then 2β – α is equal to :
1
16
2
2
3
8
4
10